Karo and other 86,700 icons from Icons8 icon pack follow the visual guidelines of the operating systems: Windows, iOS, Android KitKat, and Material. PNG format is free up to 100x100 px. Icons are availble for download in PNG and vector (SVG, PDF, EPS, and more).
Imagine a diamond. This object has four congruent sides. The sides are attached to each other and it looks like a tilted square or a baseball diamond. The four points are pointing east, west, north and south.